Avoid an early creation of CaloDescriptors.

The CaloDescriptors must not be created before the alignment callback has been fired, because the descriptors cache the alignment transform at construction time.

The creation of CaloDescriptors is e.g. triggered by the retrieval of the calorimeter detector description manager. To ensure that this happens after the alignment callback they are not retrieved anymore during the initialization of the calorimeter volume builders.

This fixes the construction of calorimeter ROIs e.g. used from brem recovery in the track finder when using the TrackingGeometryCondAlg. Without this the ROIs would lack the correct alignment.